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Member Since 29 Oct 2012
Offline Last Active Yesterday, 08:30 PM

Topics I've Started

Us Pigment Stains And Raku Glazes

04 June 2015 - 12:31 PM

Has anyone used, and are willing to comment, on US pigment encapsulated stains and raku glazes?  I'm wondering how they compare to comparable products from other companies. 

Frit As A Sealant

13 January 2015 - 10:53 PM

I make slab built platters and shallow bowls using cone 6 clay and glazes.  I like a flat bottom, no foot look but not the resulting large expanse of bare clay on the bottom of the piece.  I am wondering whether spraying the unglazed bottom with a solid coating of a solution of clear frit would enhance the aesthetics and long term functionality.  


The frit solution would be applied after the final glaze firing.  I am thinking of using a solution of Ferro Frit 3124 or 3134.  The pieces would then be fired upside down (glazed surface against the shelf) to the melting temperature of the frit which would be in the range of 1450 - 1600 degrees F (cone 016 - 012).  I am thinking the cone 5-6 glaze would not soften at these temperatures so the glazed areas against the shelf should not be a concern.


It would require an additional firing so obviously not feasible for production pottery but would it make sense for low volume decorative pieces?

Raku - Leaving Pots In Kiln

24 July 2014 - 11:53 AM

I am planning to convert an old electric kiln to a raku kiln.  I am wondering if there is any reason not to introduce the smoke and reduction atmosphere into the kiln rather than remove the ware and reduce in separate containers.  Combustibles would be added to a chamber built underneath the kiln (after turning off electricity to the elements) and any openings in the kiln closed up.  It would then be left to cool on its own and opened the next day.


In my research so far most of the reasons not to use an electric kiln as a reduction kiln are not applicable


- the kiln will be outside on a large rural property with lots of airflow so toxic gases, carbon monoxide and upset neighbors should not be a concern.

- I'm not worried about element deterioration.  When they no longer function adequately the kiln will be further converted to operate with a gas burner

- there is no need for rapid and/or multiple firings


I've read the postings here and found other sources that describe how to create a reduction environment in an electric kiln but all the sources I found dealing with raku using an electric kiln involve removing the items and reducing in containers.  Do raku glazes require a fast cool to effect their color reactions or would the results be similar if left in the kiln after an adequate reduction environment had been created?


Any insights or suggestions will be greatly appreciated.